Metallic window construction



July 31, 1934. J. E. DENNIS METALLIC WINDOW CONSTRUCTIGN 3 Sheets-Sheet l jiled March 14, 1931 2%. Z

g5 ,zo 7K6 J. E. DENNIS METALLIC WINDOW CONSTRUCTION July 31, 1934.

- Filed March 14, 19.31. 3 Sheets-Sheet 2 July 31, 1934. .1. E. DENNIS METALLIC WINDOW CONSTRUCTION 3 Sheets-Sheet 3 Filed March 14, 1931 Patented July 31, 1934 UNITED STATES PATENT ori-ICE Application March 14,4

19 Claims.

This invention relates to improvements in metallic window constructions, and it has for its primary object the production of a Window frame of simple and inexpensive construction possessing the qualities of sealing tight the window sashes slidable therein, and in which provision is made to prevent the passage of air currents passing through the outer :slideway from reaching the inner slideway in which the upper and lower sashes are respectively retained.

A further object of my invention is the provision of yielding elements, preferably non-corrosive, in contact with which the sashes of the window are adapted to move, said yielding ele- 'j ments providing contact faces or edges for Vthe sashes which yield under expansion and contraction so that under all temperature conditions, assurance is had of a positive seal against the entrance of air-currents or dust from the Vexterior to the interior` 1 A still further object of my invention is the application of inherently-resilient elements to portions of the side frame members, under which term shall be broadly included the spacing or `parting stops or members and the inner window stops.

Further objects of my invention will be apparent from the description to follow; such being means to stiffen certain parts of angularly formed walls of the frame and details of construction, all tending to increase the eiiiciency and durability of the frame, and also. the simplicity of the construction thereof.

With the above-mentioned and other objects to appear hereinafter in View, the invention consists in the novel construction, and in the arrangement and combination of parts to behereinafter described 'and more particularly pointed out in the subjoined claims.

In the drawings:

Fig. 1 is a broken central vertical ysection through a metallic window structure constructed in accordance with my invention.

Fig. 2 is a broken verticalY section taken on line 2 2, Fig. 1, showing one side only of the window structure. l

Fig. 3 is a horizontal section through the upper sash vof the window structure at one side thereof, the section being taken on line 3 3, Fig. 2.`

Fig. 4 is a similar section through the opposite side of the window, taken on a plane passing through the lower Window sash.

Fig. 5 is an enlarged horizontal section, taken on line 5 5, Fig. 2.

1931, serial No. 522,643

(ci. 18s-72) Fig. 6 is a broken Vertical section taken onV line 6 6, Fig. 2.

y. Fig. 7 is a perspective View of a portionof one of the spacing or parting stops.

Fig. 8 is a perspective View of a portion of the resilient contact strip or element adapted to be applied to a spacing or parting stop.

Fig. y9 is a perspective View of a portion of the contact element applied to the inner wall of each of the hollow side members of the Awindow frame for contact with the inner faces of the Stiles of the lower window sash. K

Fig. 10 is an enlarged vertical section -throug the lower rail of the lower window sash and adjacent parts, taken on line 10 10, Fig. 2, said sash being slightly elevated.

Referring to the drawings in detail, the window frame comprises a lintel 11 which is preferably hollow or of box-like formation in cross section, hollow or box-like side members 12, and a channeled lower member or vsill 13; these members being' preferably connected 'together at their ends by welding or otherwise to'form the angles or corners of the frame so that the frame may be inserted into the wall as a unitary structure. If desired, however, this frame may be constructedby connecting the parts together while building up the wall of a building.

Slidably arranged within the window frame, in a manner to appear hereinafter, are the upper and lower glazed sashes 14, 15, respectively, each being adapted to be guided in suitable ways, formed in the side members 12 of the frame.

The lintel 11 has an'outer wall 16, an inner wall 1'?, an inner edge wall 18, and an outer edge wall 19. As stated, this lintel is hollow and substantially rectangular in cross section; it being preferably formed of'three strips or sheets of metal, 20, 21 and 22, the sheet or strip 20 forming part of the louter kwall 16 and being bent along its marginal portion to provide outwardly-extending flanges 23. Sheet 21 is bent at right angles to form a portion of the inner wall 17 and the entire outer edge wall 19 thereof; it being bent at the outer edge wall, as at 24, in line with the sheet or strip of metal 20, thus forming a supporting shoulder for overhanging portions of thewall directly above, and its marginal portion is directed outwardly to form a flange 25, which lies against the outer flange 23 of the sheet or strip 20, and is welded or otherwise fastened thereto. f

Sheet or stripj22 is Ybent at a right angle between its opposite' longitudinal edges to form the remaining portion of the inner wall 17 and the entire inner edge wall 13. Near its marginal portion it is rebent, as at 26, parallel with the inner wall 17, and offset with respect to the sheet or strip to form an upwardly-facing supporting shoulder, and its marginal portion is bent at right angles to said shoulder to form a flange 27 which lies against the inner flange 23 of the sheet or strip of metal 20, and is welded or otherwise secured thereto.

The strip of metal 22 is bent inwardly at a point spaced from its inner edge to form a supporting web or wall 28, which divides the lintel into two chambers 29, 30 and the marginal portion of this supporting web is bent at a right angle, or substantially so, to form a flange 31 which is spotwelded or otherwise fastened to the sheet or strip 20. It is to be noted that the portion of the inner wall of the lintel formed by the sheet or strip 22, is rigidly supported by the inner edge wall 18 and the supporting web or wall 28, and therefore can be made of comparatively thin gage metal. Due to the fact that no such support is provided for the inner edge of the sheet or strip 21, the latter is preferably made of heavier gage metal so as to retain its rigidity after being fashioned to form. The space between the inner edge of the strip or sheet of metal 21 and the inner portion of the inner wall 17 and the supporting web or wall 28, serves as a flange-receiving slot 32.

Although each window frame has two side members l2, a detailed description of one only need be given as they are exact duplicates. Each hollow side member 12 of the frame comprises an outer wall 33, an inner or jarnb wall 34, an outer edge wall 35 and an inner edge wall 36, all formed of sheet metal. The inner or jamb wall has sash-receiving portions formed of re-entrant portions 37 extending lengthwise from top to bottom. In preferred form, the outer wall 33 is formed of a strip of metal bent at right angles, as at 38; one marginal portion of said strip being bent outwardly at right angles to form a flange 39, to which one marginal portion of a sheet or strip of metal 40 is spot-welded or otherwise secured, forming part of said outer edge wall 35', and being disposed at a right angle to the outer wall 33.

The inner or jamb wall 34 of each side member 12`is formed of two sheets or strips of metal 41, 42, part of each sheet or strip forming a part of an edge wall of a side frame member. The sheet or strip 42 is bent, as at 43, between its longitudinal edges to form a portion of the inner or jamb wall 34 and a portion of the outer edge wall 35.

' Spaced from the angle formed by bending said sheet or strip of metal 42 is a re-entrant portion 44 arranged parallel with the inner or jamb wall 34,' and at its outer marginal portion said sheet or strip'of metal 42 is bent outwardly at a right angle to form a securing flange 45 which over'- laps the inner marginal portion of the sheet or strip of metal 40, to which it is spot-welded lor otherwise fastened. The outer edge wall Ytherefore has an outwardly protruding portion along its full length, which abuts against a portion of the wall surrounding the window frame, designated by the numeral 46.

The sheet or strip of metal 4l is bent between its longitudinal edges, as at 47, and the metal adjacent its outer marginal portion is bent at a right langle to form an outwardly facing shoulder 48, the marginal portion being bent at a right angle to said shoulder to form a securing flange 49, which lies against the inner side of the adjacent marginal portion of the sheet or strip forming the outer wall 33 and a portion of the inner edge wall 36 and is spot-welded or otherwise fastened thereto. The sheet or strip of metal 4l is also bent at two places between its inner edge: and the angle formed by the bend 47 to form the: two re-entrant portions 37 serving as sash-receiving grooves or ways; each of these being formed by bending the metal outwardly, as at 50, thence laterally, as at 51, and thence inward-- ly, as at 52. In this manner the grooves or ways are formed substantially U-shaped and they are spaced apart to form a support for a spacing or parting stop 53 adjustably secured thereto. The inner marginal portion of the sheet or strip 41 is rebent and lies against the inner marginal portion of the strip or sheet 42 to which it is spot-welded or otherwise fastened, thus permanently connecting said strips together and forming a rigid inner or jamb wall. The inner marginal portion of the sheet or strip is preferably offset slightly, as at 54, to form a depres-` It is to'be noted that the inner portion of the' inner wall 34, extending from the inner edge Wall 36 to the inner groove 37 and betweenV the two grooves 37, is offset or out of line with respect to the outer portion of said inner wall,

formed by the sheet or strip 42.

The spacing or parting stop 53, so called because it spaces or parts certain portions of the window sashes, is formed of a strip of metal rebent `upon itself at opposite sides of its central region, as at 56, forming outstanding flanges or free corners, and from such rebent portions the sheet or strip is bent or directed outwardly, as at 57. The portions 57 may be termed bearing flanges, since they are adapted to lie against the intermediate inner wall portion, which term may also be applied to that portion of the inner wall between the two grooves 37. This spacing or parting stop is preferably laterally adjustable, having laterally elongated openings or transverse slots 58 formed therein at intervals along its length through which securing screws 59 are passed which are threaded into the partingstrip supporting-section or intermediate inner wall portion 55.

Covering the inner face of the spacing or parting stop is a brass, bronze, or other non-corrosive inherently-resilient contact strip or element 60, which has its longitudinal marginal portions recurved, as at 61, to embrace, under its inherent resiliency, the free corners or edges of the fianges of said stop; and this Contact strip or element is provided between its edges with inmainder ofthe intermediate portion of the strip; also that saidcontact strip has openings 63 therein which are lined with the transverse slots 58 in the spacing or parting stop; thus rendering said stop. easily applied to :orV removable from the side member proper, and also permitting. the ready adjustment of said stop by reasonof the accessibility to the screws 59 so provided. The opposite marginal portions of the spacingor parting stop 53 and the contact strip applied thereto overhang the ref-entrant portions or grooves 37.

vAretainer stop 6a isfadjustably secured to the inner portion of the inner, wall, between the in-` ner groove 37 .and inner edge wall 36. rlhis retainer stop is secured tosaid inner wall portion by means ofscrews and'while it is preferably narrower than-the parting stop, it is constructed in substantially the same manner and is also provided with transversely elongated openings or transverse slots 66 similar to the openings or slots 58,-in said ,spacing` or parting stop, and through said openings 66, the securing screws 65 are passedgsaidrscrews being threaded into the inner wallportion. On this retainer stop, so

called because it retains and assists in guiding the movements of the lower window sash, a brass, bronze, or other flexible contact strip 67 is .secured. Thiscontact strip is formed substantially like the contact strip 60 applied to the spacing; or parting stop and it is applied to the re.- tainer stop 64 in the same manner as said contact strip 60 is applied to said spacing or parting stop; it having the line contact ribs or beads 68 spaced apart and formed out of the metal of the contact strip. Contact strip 67 is held in spaced relation to the surface of said retainer stop across the major portion of its width so that it may yield inwardly and outwardly under its inherent resiliency. This retainer stop with its applied contact strip overhangs the inner groove 37 of the inner wall 34.

A'contact strip 69 is formed of a strip of brass, bronze, or other non-corrosive resilient material fashioned into .lforniation in cross section. It

therefore comprises a U-shaped portion 70, a short side member 71 and along side member 72. Itis snapped over the inner marginal portions of the sheets of metal il and 42 where they overlie each other and are spot-welded or otherwise secured together. The free marginal portion of thelong member of this contact strip is bent or curved in wardly, as at 73, to engage a shoulder 74 formed Aon the sheetor strip of metal 42 by oifsetting its inner. marginal portion thereof. Said Contact strip is retained on the inner wall so formed by its inherent resiliency, which tends to widen the so formed sheet or strip by forcing the inwardlycurved portion 73 outwardly, the tendency being for the re-curved marginal portion to move toward the spacingor parting stop,'or in other words, inwardly. over the groove 37, which it overhangs, to agreater extent. In each hollow or box-like side member 12 of the frame, counterbalancing weights 75 are ar. ranged, and in order that these may move in each side member without interference, a protecting strip or wall 76 is arranged 'between tlfiem,l this wall being rigidly or Votherwise secured at its: upper end to the inner wall 17 ofthe lintel and dividing the hollow side member into two-way chambers; but .it may be otherwise fastened,.if desired. i Y Y Fastene'drto the re-entrant portions37 near their upper Yend, and withinsaidweight chambers, are pulleys v77 rotatable in pulley housings 78, over whichY pulley suspension-means 79, such as chains or` the like, are passed; these chains being fastened at one of their ends to the counterbalancing weights 75, and at their other ends to the stiles of the upper` and lower window sasnes 14 and l5. It is, of course, understood thatthe transverse'walls 5l of the 're-entrant portions 37 have openingsy for the passage therethrough of the pulley housings, andthat the pulleys extend into said ire-entrant portions. The pulley housings have securing flanges 8i), which liefagainst the inner sides of said transverse walls 51, and with a View of stir-lening these re-entrant portions, they are connected together by bars 8l, 82 arranged, respectively, above and below the pulley housings and against the outer sides of said transverse portions 5l, securing screws 83 being passed through Ythe flanges 80 of the pulley housings and through the transverse walls 5l of said re-entrant portions, and these screws are threaded into said stilening bars 81 and 82.

inner wall 34 of each side member, Van more particularly that portion thereof formed of the sheet 41, has an opening 84 formed therein, which extendsfrorn about the vwall 50 of one of the inner re-entrart portions 37 to about the wall 52 of' the other reentrant portion 37. This opening is provided to enable the counterbalancing weights 75 to be inserted into the hollow side ineinhers, or withdrawn therefrom, and it is closed by a closure plate 85 shaped to conform to the several wall portions through which the opening 84 extends. This closure plate is somewhat longer than the opening which it closes so as to enable securing screws 86 to be passed through their upper and lower ends and threaded into the transverse walls 5l of the re-entrant portions 37. Attention is invited to the fact that in order to form an even surface for the bearing flanges 57 of the spacing or parting stop, the parting-stop supporting-section 55 is depressed outwardly a distance equa-ling the length of said closure plate, the depth. of the depression corresponding to the thickness of the metal from lwhich said closure plate is formed. The intermediate transverse portion of said closure plate is fitted into said depression so that the inner surface of this plate yis flush with the inner surface of the supporting-section 55 of the inner wall, as clearly shown in Fig. 2. The window sashes 14 and 15 have portions thereof extending into the re-entrant portions 37, or sash-ways, as such re-entrant portions may beterrned; and preferably, the stiles of these sashes, the yupper rail of the'upper sash. and the lower rail of the lower sash have outstanding nanges 87, while the meeting rails of these sashes maybe made' with interlocking parte, as clearly shown in Fig. i, all ofv which is common in this jart. It however, to be noted that the flanges 87 projecting from stiles or side edges of the window-sashes are vin sliding engagement with the edges of the resilient contact strips of the spacing or parting stop 53 and retainer stop 6e. and that the outer side of the flange on the stile of the upper sash is in sliding engagement with the contact `strip 69, the curved marginal portions of these Contact strips being resiliently held against saidv sash flanges.

It is valso to be notedv that the resilient contact strips or facing elements are in contact with the side edges of the window sashes, and to assure resiliency under all conditions, portions of the stops 53 and 64 are depressed longitudinally, as

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at 88, to enlarge the space underneath said strips or elements. In this manner the resiliency of the contact strips or facing elements is considerably increased and assurance had of tight contact at the edges of the window sashes under all conditions and between extremes in temperature. Therefore, expansion or contraction will not affect the free sliding movements of the window sashes within the frame, and positively air-tight conditions are assured at all times.

Since the space between the parting stop 53 and the retainer stop 64 and the space between said parting stop and the contact strip 69 are comparatively narrow, considered with respect to the width of the re-entrant portions 37 into which they open, adjustment can be made .of said parting and retainer stops to an extent approximately equaling the width of each of said re-entrant portions. Such extreme adjustments, however, will at no time be found necessary; but assurance is had at all times, under the adjustment soprovided, that the side flanges of the upper window sash 14 can be forced against the contact strip 69, or when the latter is not used, against the inner edges of the sheets of metal 41 and 42, by adjustment of the parting stop 53, and that such adjustment will provide the desired contact between said parting stop and said flange and between. the contact strip 69 and said flange; also, that after adjustment is thus effected for the upper window sash, the side flanges of the lower window sash maybe forced against the parting stop 53 by adjustment of the retainer stop 64, said retainer stop being brought into the desired contact with the flange of said lower window sash. Such riding contact of the side flanges may, under ordinary conditions, be found suflicient to prevent the passage of air currents around the side edges of the sash, or the escape of heat from the interior; but as an additional guard against such occurrences, the edge contact provided by the facing strips, and more particularly by the single-line Contact ribs or beads 62 of said strips, is exceedingly desirable in climates where extremes in temperature occur.

The outstanding liange 87 on the upper rail of the upper sash is entered into the seat 32 formed in the bottom wall of the lintel, and this flange is directed by the connecting wall 28, which is at slightly obtuse angle to the under face of the lintel, into iirin contact with the free edge of the wall portion 21; thus a tight connection is made between the lintel and the upper sash when the latter is closed.

The lower member or sill 13 of the window frame has an elevated portion 89 provided with a downwardly and outwardly inclined edge 90, against which the outstanding iiange 8'7 of said lower rail is adapted to contact when the lower windowV sash is closed. rIhis lower rail has a facing edge 91 from Vwhich said flange projects, and on this facing edge is secured a resilient contact member 92 formed of thin brass, bronze, copper, or other non-corrosive material; it being concavo-convex in cross-section with its marginal portions re-curved, as at 93. This resilient member is retained within a holding strip 94 formed of a strip of sheet metal having a fiat intermediate portion 95 and re-curved marginal portions 96, which latter receive the edges of the resilient member 92. This holding strip is secured to the facing edge 91 of the lower rail of the lower window frame by means of screws 97 passed therethrough and threaded into said rail, or otherwise.

The marginal portions of the resilient member 92 and the holding strip 94 are oppositely re-curved, the free edges of the resilient member lying against the under side of the .flat intermediate portion of the holding strip, while the intermediate concave-convex portion of said resilient member extends outwardly beyond the edges of said holding strip. When closing the lower sash, this resilient member 92 engages the top of the elevated portion 89 of the sill, and the re-curved marginal portions thereof gradually close upon themselves within the .re-curved marginal portions of the holding strip, while the concavo-convex intermediate portion of said resilient members' assumes a more or less flat position, approaching that of the surface portion of the sill against which it bears. When this resilient member is in contact with the sill, the outstanding flange on the lower rail is brought in contact with the inclined forward edge of the elevated portion of the sill; thus a double line contact is provided for this rail, making it impossible for air currents to'enter from the exterior or heat to escape from the interior.

From the foregoing it will be apparent that resilient elements are interposed between relatively movable portions ofv my improved window construction. In one embodiment of my invention, the resilient element is applied to a part of a window construction movable with respect to a fixed portion, and in the other to a fixed part thereof capable of adjustment, however, if desired, and having a movable part in sliding engagement therewith.

It will further be apparent from the foregoing, that changes in construction and arrangement of parts may be resorted to within the scope of the appended claims, without departing from my invention or sacrificing any of the advantages thereof.

Having thus described my invention, what I claim is:

1. A metal window, comprising a frame having side, top and bottom members, said side members being spaced apart and each having a-n inner wall provided with vertical inwardly-opening grooves, the inner and intermediate portions of said inner walls being in alinement and the outer portion being offset with respect to said inner and intermediate portions, a parting stop secured to said intermediate portion, a retainer stop secured to said inner portion, and a yielding contact member applied to said outer portion and adapted to yieldingly contact the edge of a Window sash disposed between said side members.

2. A metal window frame, comprising spacedapart side members, a top member and a bottom member, each side member being formed of sheet metal fashioned to shape and including an inner wall provided with vertical spaced-apart inwardly opening grooves into which portions of window sashes are adapted to extend, and a laterally adjustable parting stop applied to said inner wall between the grooves thereof and having an inherently-resilient facing member` adapted to contact with the edge of a window sash.

3. A metal window frame, comprising spacedapart side members, a top member and a bottom member, each side member being hollow and formed of sheet metal to provide an outer wall, an inner wall, and edge walls connecting said outer and inner walls, said inner wall having a stop element adjustably applied thereto and provided with an inherently-resilient facing elelill said grooves.

ment adapted to bear against the' side-*edge of a `"winl'dovfv sash `and guard against the elementsY of vs ide members, a top member and bottom member, yeach side memberbeing hollow and formed of sheet metal to provide an outer wall, an inner VWal-l, and outer and inner edge walls connecting said outer and inner walls, said inner wall being bent to provide two re-entrant portions 'forming vertical grooves extending from said top member to said bottom member and a portion overhanging one of said grooves, said '.overhanging portion being provided with an inherently-resilient contact strip, and contact elements applied to said inner wall and overhanging a portion of said separately-mentioned groove and portions of the other .of said grooves, said inherently-resilient contact strip and the overhanging portions of said contact element being adapted for Contact with portions of a window sash.

6. A metal window having spaced-apart hollow side members,i each provided with vertical spaced-apart inwardly-opening grooves along their inner walls, window sashes between said side members having laterally extending flanges ,entering said grooves, and inherently-resilient contact members having recurved marginal portions .embracing parts of said inner walls to retain said-contact members thereon, said contact Imembers vhaving their recurved portions in contact with opposite sides of the flanges ventered in -7. A metal window having hollow side members, each provided with vertical spaced-apart grooves along their inner walls, window sashes between said side members having laterally extending flanges entering said grooves, and inherently-resilient Contact members disposed at opposite sides of said flanges and having recurved marginal portions embracing parts of said inner walls, said contact members being in contact between their marginal portions with the side edges of said sashes.

8. A metal window having spaced-apart hollow side members and a top and bottom wall connecting said side members, and an inherentlyresilient contact-element having its longitudinal marginal portions retained on free projectingV parts of each of said side members and being otherwise spaced therefrom for contact with the side edges of a window sash disposed between said side members.

9. A metal window having hollow spacedapart side walls formed of sheet metal and a top and bottom member connected to said side members and forming a vertically-elongated opening in which window sashes are adapted to be slidably disposed, the inner wall of each of said side members having re-entrant portions forming vertical grooves extending from top to bottom and said side walls being fashioned to provide a free extending portion overhanging a portion of one of said grooves, a resilient strip of metal bent into J-formation to provide a curved portion, a narrow side member extending Yfrom said curved portion and a wide side member also extending from saidcurved portion, said narrow member lyingagain'st one side of said free extendingV portion and said wide member against the other side thereof, said curved portion being adapted forv contact with an upper window sash having a portion extending into said separately mentioned groove, and means on said inner wall t'o otherwise guide said upper window sash and to guide a lower window sash in proper relation to said upper window sash.

i0. A window frame having a hollow side meinber formed of sheet metal fashioned into spacedapart fre-entrant portions forming vertical grooves for the reception of parallel sliding sashes, a parting stop adjustably applied to said inner wall between Vsaid grooves, and a flexible rcontact element applied to said parting stop and spaced apart along a portion of its width from said parting stop, said contact member having an inwardly-projecting bead formed thereon adapted for contact with the side edge of a window sash.

11. A window frame having a hollow side memroo ber formed or sheet metal fashioned into spacedl apart re-entrant portions forming -vertical grooves, a laterally adjustable parting stop applied to said inner wall .between said grooves, and a flexible Contact element having its marginal portions secured to said parting stop and being spaced from said parting stop along a portion of its width.v

l2. A window frame having a hoilow side meinber formed of sheet metal, the inner wall of said side member being Afashioned to receive entering portions of window sashes vertically vsli'dable along the same, a vparting member bearing against said inner wall and having transverse slots therein, screws passed through said slots j and threaded into said inner wall, and a resilient contact strip applied to the inner side of said vparting member and having openings alinedwith said slots Ito render said screws accessible.

13. A window frame having hollow side memg5,

portions, and thin metallic resilient strips apjg.,-

plied to said innerfwall at opposite sides of said depressed portions and having portions spaced therefrom to assure pressure against a window sash.

14. A window frame having a hollow side memportions having projecting corners, said corners being spaced apart to provide guide ways for portions of window sashes passed therebetween, and resilient metallic contact members applied to said inner wall and having their marginal portions curved around said projecting corners, said curved marginal portions being adapted to bear against opposite sides of portions of window sashes adapted to be positioned between said projecting corners and portions of at least two of said resilient strips having longitudinally-disposed inwardly-projecting portions spaced from said curved marginal portions adapted for contact with the side edges of the window sashes outside of said guide ways.

15. A metal window, comprising a frame having side, top, and bottom members, said side members being spaced apart and each having an inner wall provided with spaced-apart vertical lli) inwardly-openingA grooves, said inner wall being formed of two separate pieces of metal providing inner and outer portions for said inner wall, the metal cfsaid two inner wall portions being secured together and overhangling Lone of said grooves tov form a sash guide, said wall portions being offset, and a parting stop and a window stop removably applied to said inner wall'and being spaced-apart and disposed in alinement with said sash guide, said parting stop being spaced from said sash guide.

16. A metal'window, comprising a frame having side, top, and bottom members, said side members being spaced apart and' each having an inner' wall formed of an outer wall portion and an inner wall portion, said inner wall portion being bent tc form two spaced-apart re-entrant portions providing sash grooves and said outer wall portion being oiiset with respect to said inner wail portion, adjacent marginal portions of said wall portions being connected together in overlying 'condition and overhanging one of said re-entrant portions to form a sash guide, a parting stop removably secured to said innerl wall portion between said re-entrant portions and having its marginal portions overhanging said rel-entrant portions, and a sash stop removably secured to said inner wall portion and having .one of its marginal portions overhanging the inner of said re-entrant portions, said parting stop and said sash stop being alined with said outer wall portion and being spaced apart to serve as sash guides, said parting stop being also spaced from said first-mentioned sash guide to guide 'a sash therebetween.

17. A metal window, comprising a frame having sida-top, and bottom members, said side members being spaced apart and each having an inner wall formed of two sheets of metal. of dif ferent gage, the metal of heavier gage extending inwardly from the outer edge of the side member and having its inner marginal portion offset to provide a depression on its inner side, the metal of lighter gage extending outwardly from the inner edge of said side member and being bent upon itself to provide two re-entrant portions forming grooves, the outer marginal portion of the metal of lighter gagefbleing bent right angles and fitted into Vthe depression 'at the inner marginal portion of the metal'of heavier gage and fastened thereto, the metal of lighter.

rigidly connected together, one sheet of-metai l forming the inner wall portion of said inner wall and extendingoutwardly from the inner edge "of said side member and the other forming the outer wall portion of said inner wall and extending inwardly from the'outer edge of said side member, said inner wall portion being offset with respect to said outer wall portion and having a parting stop and an inner sash stop removably applied thereto in iine with said outer wall portion.

i9. A metal window, comprising a frame havingv side, top, and bottom members, said side members being spaced. apart and each having an inner wail formed of two diierent sheets vo'f metai, one sheet of metal forming the inner wall portion of said inner wall and extending outwardly from the inner edge of said side member and the other forming the outer wall portion of said inner wail and extending from the outer edge of said side'inember, said inner wall portion being bent to provide outer and inner reentrant portions to Arespectively receive parts of the upper and lower sashes of thewindow, the portion of said inner wall portion extending'from the inner re-ent-rant portion of the inner wall to the inner side edge of the side member being offset with respect to the outer wall portion of said inner wall,`and a sash stopfapplied to said inner portion between said inner re-entrant portion and said inner side edge, said sash stop being in alinement with said outer wall portion.

JOHN E. DENNIS.

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